brake sensor AUDI Q7 2012 Owner´s Manual

Electronic differential lock (EDL)
The electronic differential lock monitors the
rotational speed of the drive wheels.
G ener al note s
The electronic differentia l lock (EDL) helps the
car to start mov ing, accelerate and climb a
gradient on surfaces providing poor or almost
no gr ip . W ithout EDL, this would be difficult,
if not impossible .
How the s yst em work s
The EDL operates automatically . It monitors
the rotat ional speed of wheels w ith the help
of the ABS sensors <=>
page 223. If a noticea­
ble
slip i s detected at the wheels (e.g . on slip­
pery ground
on one side), the spinning wheels
are braked and power is transferred to the
other wheels. This is done up to a speed of
about 60 mph (100 km/h). Noises from the b rake system signal that wheel spin is being
contro lled .
Driving off
When driv ing off , a lways be sure to keep road
conditions in mind as you accelerate . If one
drive whee l spins because it is on a surface
with less grip, apply
plenty of throttle until
the car starts to move.
Overheating of brakes
To prevent the disc brake of the b raked wheel
from ove rheating if subjected to excessive
l oads on this whee l, the EDL cuts out tempo ­
ra rily. The vehicle remains operational and be­
h aves in the same way as a vehicle without
EDL.
As soon as the brake has cooled down, EDL
switches on again automatically .
A WARNING
-When accelerating on slippery surfaces,
such as on ice or snow, always be careful
when depressing the acce lerator pedal.
Even with the EDL working, the drive
wheels can spin and reduce your ability
to control your car . R isk of crash!
Int ellig ent technolog y 221
-The increased safety afforded by EDL
does not mean that you can take safety
risks. Always adapt your driving style to
the road condit ions and traffic situation .
(!) Tips
If a fault occurs in the ABS, the EDL is also
not functioning. This is ind icated by the
ABS warning light <=>
page 18.
' Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the
driven wheels from spinning when the car is
accelerating.
G eneral not es
The Anti-Slip Regulation System (ASR) is inte­
grated in the Electronic Stability Control
(ESC). When the vehicle starts up and acceler­
ates, the wheels are prevented from spinning
by adjust ing the eng ine power to match the
amount of grip available from the road sur ­
face .
How the system works
ASR performs automatica lly, i.e. without the
driver 's intervention. With the aid of the ABS
sensors <=>
page 223, ASR monitors the speed
of the dr iven wheels. If the wheels start to
spin, engine torque is reduced automatically
unt il the t ires find enough grip to lock onto
the road surface. The system is active across
the enti re speed range.
The ASR works in conjunction with the ABS. If
a malfunction should occur in the ABS, the
ASR wi ll also be ou t of act ion.
A WARNING
The increased safety affo rded by ASR does
not mean that you can take sa fety risks.
A lways adapt your driving sty le to the road
conditions and traffic situation. ...,
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Engine Compartment .... ..... ... ... ... ...
260
Coolant .. .. .... ........ ... .. .. .. . 265
Hood .. .. .. ...... ........... .. ... 258
Starting . . . . . . . . . . . . . . . . . . . . 105 , 106
Starting with jumper cables .. ... .... 308
Stopping ... ... .. ... ... .. .. .. .. .. . 106
Engin e compartm ent
Safety instructions ... ..... .. .. .. .. .
258
Working the engine compar tmen t ... . 258
Engine coolant system ... ... .. .. .. .. . 265
Adding coolant . .. ..... ... .. .. .. ... 267
Checking coolant leve l .. ... .. .. .. .. . 266
Checking the eng ine coolant leve l .. .. . 266
M alfunct ion .. ........... .. .. .. .. .. 32
Radiator fan .............. ... ... .. 268
Engine coolant temperature
Temperature ga ug e .... ... .. .. .. .. ..
10
Eng ine data .. .. ........... .. .. .. .. . 3 16
Eng ine hood
C losing ...................... ....
258
H ow to release the hood . .. .. .. .. .. . 258
Engine oil . .. ............. .... .. .. . 260
Adding .. .. ........ ..... .... .. .. . 264
Addi tives . .. ............. .... .. .. . 264
Changing .................. .... .. 264
Checking the eng ine o il level .. .. .. .. . 263
Consumpt ion ................. .... 262
Indications and cond it ions requ iring ex-
tra checking ............. .... .. ...
263
O il grades .. ... .. ..... ... .. .. .. ... 260
Recommended oil check intervals .. .. . 263
Specification and viscosity . ... .. .. .. . 260
Eng ine oi l level ..... ..... .. .... .. .. .. 36
Eng ine oil pressure
Malfunct io n ... .. ... ... .. .. .. .. .. ..
33
Eng ine oil sensor defective . ... .. .. .. .. 36
E ng ine speed limitat io n ..... .. .. .. .. .. 36
Entry assist
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . 7 5
Environment Break-in period . .. ..... ... .. .. .. ...
228
Catalytic converter ........ .. .. .. .. . 229
Diesel particulate filter .... .. .. .. .. . 229
Disposing of your vehicle battery .. .. . 273
Driving at h igh speeds ......... ... .. 230
D riving to m inimize pollution and no ise 230
Inde x 329
Fuel . ... .. .. .... .. . .. .. ..... ... .. 253
Fuel economy .. .... . ... ...... ... .. 230
Leaks unde r your vehicle ..... ... .. .. 258
Letting the vehicle stand and warm up . 230
Proper disposal of dra ined brake fluid . 269
P roper disposal of drained eng ine cool -
ant .. .. .. .. .. .. .. . .. ... ... .. ....
267
Proper disposal of d ra in ed eng ine oi l .. 264
Recycling used eng ine oil . ....... .... 2 64
Un leaded fuel .. .. .... .... ....... .. 2 50
Wha t shou ld I do with an o ld battery? . 273
EPC
refer to Elect ron ic power control ...... 15
ESC
refer to E lectron ic Stability Control ( ESC) 16
Event Da ta Recorde r (ED R) ..... ... .. .. 219
Exhaust tail pipes
Cleaning .. .. .. .. .. . ... ...... ... ..
244
Expansion tank .. .. ................. 266
Explanation of some technical te rms ... 232
Ex terior lighting in the mirror housing 59
Exterior m irrors
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . .
68
Dimming .. .. .. .. .. ............... . 69
Heating ... .. .. .. .... ....... .... ...
68
Eyeglasses compartment . ..... ... .. .. . 89
F
Fa ll line
Fan Fou r-zo ne automatic comfo rt air condi-232
t 1o ni ng ... .. .. .. .. . .. .......... .. . 98
Radiator .. .. .. .. .. . ... ........... 2 68
Fasten ing
Booster seats .. ... ...... ......... .
208
Convertible child safety seats ... ... .. 206
Infant seats . .. .. .. ........... .... 205
Flat tire
Changi ng ... .. .. .................
298
Floor mats . ... .. .... . ... ...... ... .. 165
Fog lights .. .. .. .... .......... ...... 58
Fo lding chocks .. .. ............. .... 295
Fo ld ing master key wi th remo te control . . 38
Foot pedals . .. .. .... .......... ..... 165
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